Hey Jason, I've not bought a lot of 09/10 SP game used but usually redemptions are valid for a year or two. Given its from last season, I'd say they would still be valid. I had a few tins of 07-08 sweet shot and got a redemption in that about 6 months ago which had only just expired then so that was about 3 yrs or so.
Don't know how long you'd have to wait to get whatever you redeem (mine's been 11 months, just requested a replacement), but I'd say they won't have expired yet.
SPGU are a cool box, good luck with it
I dont know if there are redemptions in this product as it was used a UD rubbish dump to get rid of there NBA stock before the licence expired.
I have had 3 or four redemptions recently from 08/09 sp rookie threads and they only expired November or December last year. But UD still honored them last month after getting in contact with them so if you are unlucky enough to pull a rredemption you should still be sweet.