Kay was shown a straight red card on Tuesday night following a clash with Yeovil's Paddy Madden and he will be suspended against the Cherries.
Fellow centre-half Gary MacKenzie will also be absent as he continues to struggle with the knock that forced him off during the club's historic FA Cup win at QPR last weekend.
Winger Daniel Powell (hamstring) remains a doubt but striker Ryan Lowe is expected to recover from the eye injury that forced him off after just half an hour at Yeovil.
Patrick Bamford has rejoined the Dons on loan but the teenage striker will remain with parent club Chelsea for the time being as he continues his rehabilitation from injury.
Midfielders Stephen Gleeson (broken foot) and Luke Chadwick (knee) remain unavailable to manager Karl Robinson.