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 (
    19932, 18571, 19711, 19808, 19825, 19713, 
    19752, 19712, 18568, 18565, 18567, 
    18572, 18566, 19598, 19599, 19602, 
    18570
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.01724335,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_review_prepared_data",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "7",
          "used_key_parts": ["product_id", "storefront_id"],
          "loops": 1,
          "rows": 17,
          "cost": 0.01724335,
          "filtered": 100,
          "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (19932,18571,19711,19808,19825,19713,19752,19712,18568,18565,18567,18572,18566,19598,19599,19602,18570)"
        }
      }
    ]
  }
}