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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 (
    51044, 51469, 51047, 51437, 51473, 51477, 
    51525, 51516, 51532, 51048, 51475, 
    51514, 51538, 51540, 51458, 51462
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 1

Query time 0.00036

JSON explain

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