SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10296, 10297, 10298, 10299, 10300, 10446, 
    10063, 10052, 10072, 10046, 10059, 
    10064, 10057, 10048, 10062, 10070, 
    10058, 10045, 10054, 10047
  )

Query time 0.00072

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 20,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10296,10297,10298,10299,10300,10446,10063,10052,10072,10046,10059,10064,10057,10048,10062,10070,10058,10045,10054,10047)"
    }
  }
}