Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '056b23ac294ff20e44bd46b7f174edb9f32eb4005b157e136776cf6176253cbc' 
  AND token = 'Kz8Nqe2S8UvJCEqQpf374Gn5DsvbwVDcOuUtvp5nVJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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