I can explain it though sorting it out may be a lit more difficult
what happened is that when you logged in from a new device in a very different place
aol (it has nothing to do with google you were just using the google chrome browser) flagged it as probably not you as you had never logged in from that device in that place before. so they asked you to do something to prove it was you. putting in a code from an alternate email or phone text perhaps. You did not do it so they assume it was a fraudulent attempt and sent you an email about it
Now if the account is still locked you have to follow whatever steps they outlined in the email to clear it up and get access again.
I can get you my phone number even log into your computer remotely to help you fix it if you like. But as i am not a part of aol i cant just fix it. i can only explain what happened and help you with the steps to clear it up.