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 (
    81, 107, 109, 91, 92, 161, 188, 202, 203, 
    34, 31, 38, 80, 165, 166, 86, 106, 105, 
    247, 101, 33, 32, 163, 244, 212, 155, 
    102, 55, 176, 187, 69, 138
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "12.56"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 52,
      "rows_produced_per_join": 31,
      "filtered": "61.54",
      "cost_info": {
        "read_cost": "6.17",
        "eval_cost": "6.40",
        "prefix_cost": "12.57",
        "data_read_per_join": "511"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`pankajecarter_systemsix`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`pankajecarter_systemsix`.`cscart_product_review_prepared_data`.`product_id` in (81,107,109,91,92,161,188,202,203,34,31,38,80,165,166,86,106,105,247,101,33,32,163,244,212,155,102,55,176,187,69,138)))"
    }
  }
}