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 (
    391002, 390979, 390978, 391013, 391014, 
    390986, 112217, 391009, 400923, 391023, 
    312417, 312421, 390994, 312426, 312427, 
    312428, 312429, 312430, 312431, 312432, 
    312433, 390974, 391026, 391008, 393787, 
    400916, 312423, 390980, 400921, 400925, 
    400922, 400924, 312420, 460961, 390977, 
    390984, 390981, 391005, 391003, 390987, 
    391006, 391004, 391007, 391028, 460952, 
    391015, 391021, 312434
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0194938,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_review_prepared_data",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "loops": 1,
          "rows": 53,
          "cost": 0.0194938,
          "filtered": 90.56604004,
          "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (391002,390979,390978,391013,391014,390986,112217,391009,400923,391023,312417,312421,390994,312426,312427,312428,312429,312430,312431,312432,312433,390974,391026,391008,393787,400916,312423,390980,400921,400925,400922,400924,312420,460961,390977,390984,390981,391005,391003,390987,391006,391004,391007,391028,460952,391015,391021,312434)"
        }
      }
    ]
  }
}