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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 (
    6427, 6428, 6429, 6430, 2765, 2766, 2767, 
    2768, 6352, 6353, 6354, 6355, 6356, 
    2185, 2186, 2187, 2188, 5785, 5786, 
    5787, 5788, 5789, 6641, 6219
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00024

JSON explain

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