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 (
    94, 96, 136, 90, 95, 89, 82, 84, 85, 88, 
    47, 138, 93, 87, 139, 83, 137, 248
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "13.17"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 55,
      "rows_produced_per_join": 17,
      "filtered": "32.73",
      "cost_info": {
        "read_cost": "9.57",
        "eval_cost": "3.60",
        "prefix_cost": "13.17",
        "data_read_per_join": "287"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`atulecarter_atul_demo6`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`atulecarter_atul_demo6`.`cscart_product_review_prepared_data`.`product_id` in (94,96,136,90,95,89,82,84,85,88,47,138,93,87,139,83,137,248)))"
    }
  }
}