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 (
    19938, 19939, 19940, 19941, 19943, 19600, 
    19601, 18570, 14106, 14070, 14045, 
    14051, 14044, 14097, 14093, 14105, 
    14125, 18488, 18489, 18600, 18603
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0175378,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_review_prepared_data",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "loops": 1,
          "rows": 41,
          "cost": 0.0175378,
          "filtered": 51.21951294,
          "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (19938,19939,19940,19941,19943,19600,19601,18570,14106,14070,14045,14051,14044,14097,14093,14105,14125,18488,18489,18600,18603)"
        }
      }
    ]
  }
}