"Overall it was a great point for us after being two goals down," Johnston told Sky Sports News.
"The boys showed tremendous character or desire especially, after the game against Celtic in midweek. We dominated the second half and really deserved at least a draw.
"It was two great goals from Kris Boyd and he was the quickest to react and put his face in where it hurts for the second. He is a top-quality striker and his goals show how much he means to us."
Kilmarnock are back in action next weekend when they face Dundee United.