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 (
    94, 96, 136, 90, 95, 89, 82, 84, 85, 88, 
    47, 138, 93, 87, 139, 83, 137, 248
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00031

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_review_prepared_data ALL PRIMARY 99 Using where

Result

product_id average_rating reviews_count
248 4.33 3