SELECT 
  cscart_product_review_prepared_data.product_id AS product_id, 
  cscart_product_review_prepared_data.average_rating AS average_rating, 
  cscart_product_review_prepared_data.reviews_count AS reviews_count 
FROM 
  cscart_product_review_prepared_data 
WHERE 
  cscart_product_review_prepared_data.product_id IN (
    264945, 264756, 264208, 264156, 264888, 
    264851, 264304, 264940, 264893, 264950, 
    264824, 264955, 264226, 264931
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00063

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "5.87"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 19,
      "rows_produced_per_join": 13,
      "filtered": "73.68",
      "cost_info": {
        "read_cost": "3.07",
        "eval_cost": "2.80",
        "prefix_cost": "5.87",
        "data_read_per_join": "223"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`webmarco`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`webmarco`.`cscart_product_review_prepared_data`.`product_id` in (264945,264756,264208,264156,264888,264851,264304,264940,264893,264950,264824,264955,264226,264931)))"
    }
  }
}