SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'acb22a66da660a148b71aa10d3e4ca8fef816641ececf6a544a8dfb7219ed86f' 
  AND token = 'ge+lHZxMKcCpfDt+XVOxQoVI8UKkQCwqo/QPqDvhGLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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