How long to walk from Air Asia in terminal 2 to Korean Air departure in terminal 1 of HK Airport?

I'll land at 10.15am by Air Asia in terminal 2 in HK International Airport and connect to Korean Air departing at 12.35pm from terminal 1 for Seoul/States. I have a child on stroller. I need to know if I can get to KA departure check in counter in time. Early reply appreciated as I need to buy tickets. Thank you.