If room is already paid can i check in before 2pm

Do not have answer to your question

I was able to.

If we had a full house the night before, you're likely not able to get an early check in due to housekeeping working hard to get those rooms clean before 3 o'clock check in but you can always call the hotel and ask but an already paid room or as we call it a pre-pay has nothing to do with getting privileges to an early check in