SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10390, 10394, 10393, 10392, 10386, 10389, 
    10388, 10637, 10638, 10639, 10640, 
    10641, 13013, 13014, 13015, 13016, 
    13017, 13018, 13019, 13020
  )

Query time 0.00073

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 (10390,10394,10393,10392,10386,10389,10388,10637,10638,10639,10640,10641,13013,13014,13015,13016,13017,13018,13019,13020)"
    }
  }
}