SELECT 
  pf.feature_id, 
  pf.company_id, 
  pf.feature_type, 
  pf.parent_id, 
  pf.display_on_product, 
  pf.display_on_catalog, 
  pf.display_on_header, 
  cscart_product_features_descriptions.description, 
  cscart_product_features_descriptions.internal_name, 
  cscart_product_features_descriptions.lang_code, 
  cscart_product_features_descriptions.prefix, 
  cscart_product_features_descriptions.suffix, 
  pf.categories_path, 
  cscart_product_features_descriptions.full_description, 
  pf.status, 
  pf.comparison, 
  pf.position, 
  pf.purpose, 
  pf.feature_style, 
  pf.filter_style, 
  pf.feature_code, 
  pf.timestamp, 
  pf.updated_timestamp, 
  pf_groups.position AS group_position, 
  cscart_product_features_values.value, 
  cscart_product_features_values.variant_id, 
  cscart_product_features_values.value_int, 
  pf.display_on_key_product_info 
FROM 
  cscart_product_features AS pf 
  LEFT JOIN cscart_product_features AS pf_groups ON pf.parent_id = pf_groups.feature_id 
  LEFT JOIN cscart_product_features_descriptions AS pf_groups_description ON pf_groups_description.feature_id = pf.parent_id 
  AND pf_groups_description.lang_code = 'en' 
  LEFT JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = pf.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'en' 
  LEFT JOIN cscart_product_features_values ON cscart_product_features_values.feature_id = pf.feature_id 
  AND cscart_product_features_values.product_id = 13502 
  AND cscart_product_features_values.lang_code = 'en' 
WHERE 
  1 
  AND pf.feature_type != 'G' 
  AND pf.status IN ('A') 
  AND (
    pf_groups.status IN ('A') 
    OR pf_groups.status IS NULL
  ) 
  AND pf.feature_code IN ('Brand', 'ISBN', 'GTIN', 'MPN') 
GROUP BY 
  pf.feature_id 
ORDER BY 
  group_position, 
  pf_groups_description.description, 
  pf_groups.feature_id, 
  pf.position, 
  cscart_product_features_descriptions.description, 
  pf.feature_id

Query time 0.00075

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "31.79"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "pf",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "status"
              ],
              "key": "status",
              "used_key_parts": [
                "status"
              ],
              "key_length": "3",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 89,
              "rows_produced_per_join": 32,
              "filtered": "36.00",
              "cost_info": {
                "read_cost": "2.67",
                "eval_cost": "3.20",
                "prefix_cost": "11.57",
                "data_read_per_join": "14K"
              },
              "used_columns": [
                "feature_id",
                "feature_code",
                "company_id",
                "purpose",
                "feature_style",
                "filter_style",
                "feature_type",
                "categories_path",
                "parent_id",
                "display_on_product",
                "display_on_catalog",
                "display_on_header",
                "display_on_key_product_info",
                "status",
                "position",
                "comparison",
                "timestamp",
                "updated_timestamp"
              ],
              "attached_condition": "((`cscart_db`.`pf`.`feature_type` <> 'G') and (`cscart_db`.`pf`.`feature_code` in ('Brand','ISBN','GTIN','MPN')))"
            }
          },
          {
            "table": {
              "table_name": "pf_groups",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "feature_id"
              ],
              "key_length": "3",
              "ref": [
                "cscart_db.pf.parent_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 6,
              "filtered": "19.00",
              "cost_info": {
                "read_cost": "8.01",
                "eval_cost": "0.61",
                "prefix_cost": "22.79",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "feature_id",
                "status",
                "position"
              ],
              "attached_condition": "<if>(found_match(pf_groups), ((`cscart_db`.`pf_groups`.`status` = 'A') or (`cscart_db`.`pf_groups`.`status` is null)), true)"
            }
          },
          {
            "table": {
              "table_name": "pf_groups_description",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "feature_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscart_db.pf.parent_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 6,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.52",
                "eval_cost": "0.61",
                "prefix_cost": "24.92",
                "data_read_per_join": "13K"
              },
              "used_columns": [
                "feature_id",
                "description",
                "lang_code"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_product_features_descriptions",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "feature_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "cscart_db.pf.feature_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 6,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.52",
                "eval_cost": "0.61",
                "prefix_cost": "27.05",
                "data_read_per_join": "13K"
              },
              "used_columns": [
                "feature_id",
                "description",
                "full_description",
                "prefix",
                "suffix",
                "lang_code",
                "internal_name"
              ]
            }
          },
          {
            "table": {
              "table_name": "cscart_product_features_values",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "lang_code",
                "product_id",
                "fpl",
                "idx_product_feature_variant_id",
                "fl"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "feature_id",
                "product_id"
              ],
              "key_length": "6",
              "ref": [
                "cscart_db.pf.feature_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 7,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "3.95",
                "eval_cost": "0.80",
                "prefix_cost": "31.79",
                "data_read_per_join": "318"
              },
              "used_columns": [
                "feature_id",
                "product_id",
                "variant_id",
                "value",
                "value_int",
                "lang_code"
              ],
              "attached_condition": "<if>(is_not_null_compl(cscart_product_features_values), (`cscart_db`.`cscart_product_features_values`.`lang_code` = 'en'), true)"
            }
          }
        ]
      }
    }
  }
}