SELECT 
  products.product_id, 
  products.list_price, 
  prices.price, 
  products.amount, 
  descr1.product as product, 
  companies.company as company_name, 
  cscart_supplier_links.supplier_id, 
  products.product_type, 
  products.parent_product_id, 
  products.master_product_offers_count, 
  products.master_product_id, 
  products.company_id, 
  prpd.average_rating, 
  prpd.reviews_count, 
  pvd.variant as brand_name 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  /* PERFORMANCE OPTIMIZATION - Usergroup filtering disabled 2024-02-09 for site stability */
  -- AND (cscart_categories.usergroup_ids = '' OR FIND_IN_SET(0, cscart_categories.usergroup_ids) OR FIND_IN_SET(1, cscart_categories.usergroup_ids)) 

  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_supplier_links ON cscart_supplier_links.object_id = products.product_id 
  AND cscart_supplier_links.object_type = 'P' 
  LEFT JOIN cscart_master_products_storefront_offers_count AS master_products_storefront_offers_count ON master_products_storefront_offers_count.product_id = products.product_id 
  AND master_products_storefront_offers_count.storefront_id = 1 
  LEFT JOIN cscart_product_sales USE INDEX (
    idx_product_sales_category_amount
  ) ON cscart_product_sales.product_id = products.product_id 
  AND cscart_product_sales.category_id = products_categories.category_id 
  LEFT JOIN cscart_product_review_prepared_data AS prpd ON prpd.product_id = products.product_id 
  LEFT JOIN cscart_product_features_values AS pfv ON pfv.product_id = products.product_id 
  LEFT JOIN cscart_product_feature_variant_descriptions AS pvd ON pfv.variant_id = pvd.variant_id 
  AND pvd.lang_code = 'en' 
WHERE 
  1 
  AND products.product_id NOT IN (68350) 
  AND (
    companies.status IN ('A') 
    OR products.company_id = 0
  ) 
  /* PERFORMANCE OPTIMIZATION - Usergroup filtering disabled 2024-02-09 for site stability */
  -- AND (products.usergroup_ids = '' OR FIND_IN_SET(0, products.usergroup_ids) OR FIND_IN_SET(1, products.usergroup_ids)) 

  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 1) 
  AND products.parent_product_id = 0 
  AND products.master_product_status IN ('A') 
  AND products.master_product_id = 0 
  AND (
    products.company_id > 0 
    OR master_products_storefront_offers_count.count > 0
  ) 
  AND pfv.feature_id = 62 
  AND cscart_categories.category_id IN (2813) 
  AND (
    products.amount > 0 
    OR products.tracking = 'D'
  ) 
GROUP BY 
  products.product_id 
ORDER BY 
  cscart_product_sales.amount DESC, 
  products.product_id ASC 
LIMIT 
  0, 8

Query time 0.00836

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "395.76"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "const",
              "possible_keys": [
                "PRIMARY",
                "p_category_id",
                "idx_categories_storefront_status",
                "idx_categories_usergroup_status",
                "idx_categories_status_id_path"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.10",
                "prefix_cost": "0.00",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "category_id",
                "status",
                "storefront_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "pt",
                "idx_product_category_lookup",
                "idx_products_categories_composite"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id",
                "product_id"
              ],
              "key_length": "6",
              "rows_examined_per_scan": 644,
              "rows_produced_per_join": 644,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "66.76",
                "eval_cost": "64.40",
                "prefix_cost": "131.16",
                "data_read_per_join": "10K"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ],
              "attached_condition": "((`cscart_db`.`products_categories`.`category_id` = 2813) and (`cscart_db`.`products_categories`.`product_id` <> 68350))"
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "age_verification",
                "status",
                "idx_parent_product_id",
                "idx_master_product_id",
                "youtube_link",
                "idx_products_parent_lookup",
                "idx_products_status_company",
                "idx_products_master_status",
                "idx_products_inventory",
                "idx_products_status_company_master",
                "idx_products_main_query",
                "idx_products_query_opt",
                "idx_products_composite_query",
                "idx_kl_qc_enabled"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 32,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "170.34",
                "eval_cost": "3.22",
                "prefix_cost": "365.90",
                "data_read_per_join": "168K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "list_price",
                "amount",
                "tracking",
                "parent_product_id",
                "master_product_id",
                "master_product_status",
                "master_product_offers_count"
              ],
              "attached_condition": "((`cscart_db`.`products`.`master_product_id` = 0) and (`cscart_db`.`products`.`parent_product_id` = 0) and (`cscart_db`.`products`.`status` = 'A') and (`cscart_db`.`products`.`master_product_status` = 'A') and ((`cscart_db`.`products`.`amount` > 0) or (`cscart_db`.`products`.`tracking` = 'D')))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "cscart_db.products.company_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 32,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "8.05",
                "eval_cost": "3.22",
                "prefix_cost": "377.17",
                "data_read_per_join": "224K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ],
              "attached_condition": "<if>(found_match(companies), ((`cscart_db`.`companies`.`status` = 'A') or (`cscart_db`.`products`.`company_id` = 0)), true)"
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id",
                "idx_product_prices_usergroup_limit",
                "idx_prices_discount_lookup",
                "idx_prices_min_calc",
                "idx_prices_usergroup_lookup",
                "idx_prices_usergroup_product"
              ],
              "key": "idx_prices_usergroup_lookup",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "5.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "8.44",
                "eval_cost": "0.16",
                "prefix_cost": "388.83",
                "data_read_per_join": "38"
              },
              "used_columns": [
                "product_id",
                "price",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`cscart_db`.`prices`.`lower_limit` = 1) and (`cscart_db`.`prices`.`usergroup_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "cscart_supplier_links",
              "access_type": "ref",
              "possible_keys": [
                "object_id",
                "idx_supplier_product_lookup",
                "idx_supplier_products"
              ],
              "key": "object_id",
              "used_key_parts": [
                "object_id",
                "object_type"
              ],
              "key_length": "7",
              "ref": [
                "cscart_db.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.97",
                "eval_cost": "0.16",
                "prefix_cost": "389.96",
                "data_read_per_join": "25"
              },
              "used_columns": [
                "supplier_id",
                "object_id",
                "object_type"
              ],
              "attached_condition": "<if>(is_not_null_compl(cscart_supplier_links), (`cscart_db`.`cscart_supplier_links`.`object_id` = `cscart_db`.`products_categories`.`product_id`), true)"
            }
          },
          {
            "table": {
              "table_name": "master_products_storefront_offers_count",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "idx_storefront_id",
                "idx_storefront_product_count"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "storefront_id"
              ],
              "key_length": "8",
              "ref": [
                "cscart_db.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.40",
                "eval_cost": "0.16",
                "prefix_cost": "390.53",
                "data_read_per_join": "25"
              },
              "used_columns": [
                "storefront_id",
                "product_id",
                "count"
              ],
              "attached_condition": "(<if>(found_match(master_products_storefront_offers_count), ((`cscart_db`.`products`.`company_id` > 0) or (`cscart_db`.`master_products_storefront_offers_count`.`count` > 0)), true) and <if>(is_not_null_compl(master_products_storefront_offers_count), (`cscart_db`.`master_products_storefront_offers_count`.`product_id` = `cscart_db`.`products_categories`.`product_id`), true))"
            }
          },
          {
            "table": {
              "table_name": "cscart_product_sales",
              "access_type": "ref",
              "possible_keys": [
                "idx_product_sales_category_amount"
              ],
              "key": "idx_product_sales_category_amount",
              "used_key_parts": [
                "category_id",
                "product_id"
              ],
              "key_length": "6",
              "ref": [
                "const",
                "cscart_db.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.40",
                "eval_cost": "0.16",
                "prefix_cost": "391.09",
                "data_read_per_join": "25"
              },
              "used_columns": [
                "category_id",
                "product_id",
                "amount"
              ]
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id",
                "idx_product_desc_lang",
                "idx_product_name_search",
                "idx_product_desc_sort"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscart_db.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.10",
                "eval_cost": "0.16",
                "prefix_cost": "392.35",
                "data_read_per_join": "7K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "pfv",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "product_id",
                "fpl",
                "idx_product_feature_variant_id",
                "fl"
              ],
              "key": "idx_product_feature_variant_id",
              "used_key_parts": [
                "product_id",
                "feature_id"
              ],
              "key_length": "6",
              "ref": [
                "cscart_db.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.97",
                "eval_cost": "0.19",
                "prefix_cost": "393.51",
                "data_read_per_join": "77"
              },
              "used_columns": [
                "feature_id",
                "product_id",
                "variant_id",
                "lang_code"
              ]
            }
          },
          {
            "table": {
              "table_name": "pvd",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "variant_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscart_db.pfv.variant_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.76",
                "eval_cost": "0.19",
                "prefix_cost": "394.46",
                "data_read_per_join": "14K"
              },
              "used_columns": [
                "variant_id",
                "variant",
                "lang_code"
              ]
            }
          },
          {
            "table": {
              "table_name": "prpd",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 3,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.91",
                "eval_cost": "0.39",
                "prefix_cost": "395.76",
                "data_read_per_join": "61"
              },
              "used_columns": [
                "product_id",
                "storefront_id",
                "average_rating",
                "reviews_count"
              ]
            }
          }
        ]
      }
    }
  }
}