In Scrum, all events are time-boxed, this means that an event should not go past its defined duration. The daily Scrum timebox is 15 minutes and it is therefore not fine for it to last more than this time. If this is your case, the following may help you: more often than not, the Developers are trying to solve issues within the daily Scrum. If this is the case, identify the related impediment and call for a meet after with the Developers who can actually solve it.