SELECT 
  products.product_id, 
  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 
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 
  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 ON cscart_product_sales.product_id = products.product_id 
  AND cscart_product_sales.category_id = products_categories.category_id 
WHERE 
  1 
  AND (
    companies.status IN ('A') 
    OR products.company_id = 0
  ) 
  AND products.company_id IN (13, 0) 
  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, 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 (1) 
GROUP BY 
  products.product_id 
ORDER BY 
  cscart_product_sales.amount desc, 
  products.product_id ASC 
LIMIT 
  3048, 24

Query time 0.18349

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "707.15"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "master_products_storefront_offers_count",
              "access_type": "system",
              "possible_keys": [
                "PRIMARY",
                "idx_storefront_id"
              ],
              "rows_examined_per_scan": 0,
              "rows_produced_per_join": 1,
              "filtered": "0.00",
              "const_row_not_found": true,
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.10",
                "prefix_cost": "0.00",
                "data_read_per_join": "16"
              },
              "used_columns": [
                "storefront_id",
                "product_id",
                "count"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "index_merge",
              "possible_keys": [
                "PRIMARY",
                "age_verification",
                "status",
                "idx_parent_product_id",
                "idx_master_product_id",
                "youtube_link"
              ],
              "key": "intersect(status,idx_parent_product_id,idx_master_product_id)",
              "key_length": "3,4,4",
              "rows_examined_per_scan": 2295,
              "rows_produced_per_join": 45,
              "filtered": "2.00",
              "cost_info": {
                "read_cost": "623.88",
                "eval_cost": "4.59",
                "prefix_cost": "628.47",
                "data_read_per_join": "238K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids",
                "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`.`company_id` in (13,0)) and ((`cscart_db`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`cscart_db`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`cscart_db`.`products`.`usergroup_ids`))) and (`cscart_db`.`products`.`status` = 'A') and (`cscart_db`.`products`.`master_product_status` = 'A') and ((`cscart_db`.`products`.`company_id` > 0) or <cache>((NULL > 0))))"
            }
          },
          {
            "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": 45,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "4.59",
                "prefix_cost": "633.06",
                "data_read_per_join": "319K"
              },
              "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": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscart_db.products.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 45,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "4.59",
                "prefix_cost": "637.65",
                "data_read_per_join": "209K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_supplier_links",
              "access_type": "ref",
              "possible_keys": [
                "object_id"
              ],
              "key": "object_id",
              "used_key_parts": [
                "object_id",
                "object_type"
              ],
              "key_length": "7",
              "ref": [
                "cscart_db.products.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 45,
              "filtered": "100.00",
              "index_condition": "<if>(is_not_null_compl(cscart_supplier_links), (`cscart_db`.`cscart_supplier_links`.`object_id` = `cscart_db`.`products`.`product_id`), true)",
              "cost_info": {
                "read_cost": "11.48",
                "eval_cost": "4.59",
                "prefix_cost": "653.71",
                "data_read_per_join": "734"
              },
              "used_columns": [
                "supplier_id",
                "object_id",
                "object_type"
              ]
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id",
                "idx_product_prices_usergroup_limit"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 45,
              "filtered": "99.99",
              "cost_info": {
                "read_cost": "11.48",
                "eval_cost": "4.59",
                "prefix_cost": "669.78",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`cscart_db`.`prices`.`lower_limit` = 1) and (`cscart_db`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "pt",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 51,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "26.88",
                "eval_cost": "5.12",
                "prefix_cost": "701.77",
                "data_read_per_join": "819"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.products_categories.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 2,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.26",
                "prefix_cost": "706.89",
                "data_read_per_join": "7K"
              },
              "used_columns": [
                "category_id",
                "usergroup_ids",
                "status",
                "storefront_id"
              ],
              "attached_condition": "(((`cscart_db`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`cscart_db`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`cscart_db`.`cscart_categories`.`usergroup_ids`))) and (`cscart_db`.`cscart_categories`.`status` in ('A','H')) and (`cscart_db`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "cscart_product_sales",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "pa"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id",
                "product_id"
              ],
              "key_length": "6",
              "ref": [
                "cscart_db.products_categories.category_id",
                "cscart_db.products.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 2,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.26",
                "prefix_cost": "707.15",
                "data_read_per_join": "40"
              },
              "used_columns": [
                "category_id",
                "product_id",
                "amount"
              ]
            }
          }
        ]
      }
    }
  }
}