Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd13eb35b4ce336d4dac950d235ee1b33b8fdb62639ddf6e08d9cf5a2eacace2d' 
  AND token = 'fb+rHuKejwJmKOKF6j0AQZNSKwK8WLBohM/4j+IK928=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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