Is there 45 minutes between the time you plan to scan in to Soarin, or from the time you think you will be off of Soarin. Soarin itself is about 5 minutes- but it also involves typically waiting in the loading zone another 5 minutes, and possibly even a short line before you get there with FP+. Living with the Land is a 15 minute ride. Looks like you are talking later in the Morning since it is before a lunch ADR. Assuming you are talking about the time you get off Soarin and you have a 10 minute wait for Living with the Land--and it would probably be anywhere from 5 minutes to 20 minutes at that time of day--then that would be about 35 minutes of the 45, and then you could just check in to Garden Grill a few minutes early. We really enjoy Living with the Land. DD was 2 on her first ride, and I wondered whether she would like it, but she absolutely loved it...something about those greenhouses.
If you do wind up with extra time to walk to another building, then there is the Figment ride (Journey Into Imagination) which might still have a short line on the building on one side, and the Nemo ride (which used to be walk on-but now can have a pretty good length line in the mornings) and the aquariums on the building on the other side.