First flight out of IAH

Hello,

I have a flight that starts boarding at 4:20am this week. I realize security isn’t open 24/7, what time should I arrive? I will be flying out of terminal C. Based on the hours online, Terminal A opens at 3:30am and Terminal C opens at 4am. Should I be trying to go through security in terminal A or wait until security opens in C? Flight leaves the gate at 5am.