Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46fb7b72a9bd479676bdc3018ed4b5cfe73ac3d9d62d2e3600dc5bfb2f87ab8b' 
  AND token = 'iRoAQQv6hOQQG/7tQheCSAjnCP/3h7YIqXwwiJEVPe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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