Apps can retrieve a Page access token from Page admin users when they authenticate with the
manage_pages permission. If the User access token used to retrieve this Page access token is short-lived, the Page access token is also short-lived. If the User access token you use to retrieve this Page access token is a long-lived token, you get a long-lived Page token that is good for at least 60 days.
However, if you use a Page administrator token and your app has business permissions, the returned Page access token does not expire. This is also the case if your app has these capabilities: