SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10046, 10047, 10048, 10050, 10051, 10052, 
    10054, 10055, 10056, 10057, 10058, 
    10059, 10060, 10061, 10062, 10063, 
    10064, 10065, 10066, 10067
  )

Query time 0.00086

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 (10046,10047,10048,10050,10051,10052,10054,10055,10056,10057,10058,10059,10060,10061,10062,10063,10064,10065,10066,10067)"
    }
  }
}