Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4ccf320dd64d42eedb962380ee5816cc1d065b53553a10686be052316d16f4f' 
  AND token = 'zNudNH8UpSODb7tUrP422PsGcsdTKOOQorVrv5obuYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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