Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49d44a46bd828b3121485785eeba64e0736eb8a4af10d4c603e2979e7c80c92b' 
  AND token = '/8fCGpNV0DHwSODPg+9XtEAOtIWUuT/ZWNk9dbMNT+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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