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 (
    325721, 21545, 18228, 163607, 164330, 
    169528, 175066, 184043, 191208, 216438, 
    263004, 279659, 295751, 307166, 308366, 
    315969, 315971, 317489, 317495, 317523, 
    317945, 321995, 321998, 324572
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.80"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 3,
      "rows_produced_per_join": 3,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "0.50",
        "eval_cost": "0.30",
        "prefix_cost": "0.80",
        "data_read_per_join": "48"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`unicomps`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`unicomps`.`cscart_product_review_prepared_data`.`product_id` in (325721,21545,18228,163607,164330,169528,175066,184043,191208,216438,263004,279659,295751,307166,308366,315969,315971,317489,317495,317523,317945,321995,321998,324572)))"
    }
  }
}