Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc884a588b45c00a5bf33fd911d4c70f9826df7516e9c9fdafa09781ae39cb8' 
  AND token = 'ZDQtBF/2aH40XyCEUeR81F74h/syZ9jzkT4Jy0qmTog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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