Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16f4c120edfffa39a56599ab9ae533d732f292731d59e212160981e72d1c1758' 
  AND token = '2y6Q0W7PqWMN4zt4goexuCX1WKDbtl5Qs1wB7ylyhT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}