Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '468328874e2cc2030ae30c34beb4bc7f30b1684af7e6e34a4cd6b401fdcc3f11' 
  AND token = 'v0SPs0nWXJpd3xeQg9k5/44tYjq3ltPdMERhMVPYaj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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