The room you are seeking has 2 queen beds and a daybed

You may search this thread using the keyword daybed (rather than sofa bed) for more information.
This post from page 70, talks about staying at another hotel the night before to allow early checkin
All 39 daybed rooms are located above the main entrance and are booked as standard rooms, none have pool/park/DTD views.
Your odds of getting the daybed are not great. There are twice as many rooms with a single king bed, and my request was met only once in about 10 visits
Some things to improve your chances:
1. Checkin as early as possible. I have checked in at 6AM to take advantage of Magic Morning.
2. Call the GCH and make sure your daybed request is noted on your reservation.
3. Make your reservation for 5 adults. This might cause a daybed room to be assigned to you, but I don't know for sure