Sandbox

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 (
    3704, 3705, 3706, 3707, 6723, 6717, 6720, 
    3151, 3864, 3145, 6721, 3863, 3148, 
    6718, 6722, 3144, 3147, 3096, 339, 3104, 
    3107, 6682, 6678, 104
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}