The information obtained from http://graph.facebook.com/page_id provides the basic information about the Page but it does not include any information about the created_time of the Facebook Page.
Is it possible to obtain this information if an access token to manage pages is retrieved?
No, there’s no such field retrievable in the API but if the page has Timeline enabled they may have added a ‘founded’ date or similar as a milestone, which may be of use depending on what you’re doing