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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 (
    20206, 19869, 20132, 20207, 20192, 20111, 
    20097, 20098, 20127, 20126, 20101, 
    20100, 20131, 19863, 20104, 20128, 
    20130, 20129, 19866, 19868, 20108, 
    19865, 20226, 19867
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00034

JSON explain

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