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 (
    426897, 415377, 388453, 389558, 390161, 
    390193, 390198, 389507, 388957, 415496, 
    389263, 390209, 390316, 388958, 390273, 
    389359, 388544, 388479, 389452, 390257, 
    388513, 389873, 390129, 389532, 390192, 
    389827, 388454, 390243, 390164, 389428
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00040

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": 19,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "2.07",
        "eval_cost": "3.80",
        "prefix_cost": "5.87",
        "data_read_per_join": "304"
      },
      "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 (426897,415377,388453,389558,390161,390193,390198,389507,388957,415496,389263,390209,390316,388958,390273,389359,388544,388479,389452,390257,388513,389873,390129,389532,390192,389827,388454,390243,390164,389428)))"
    }
  }
}