In your World of Warcraft folder open the file realmlist.wtf replace any existing entry with one of the following possibilities, save and exit.
set realmlist west.kronos-wow.com
set realmlist north.kronos-wow.com
set realmlist east.kronos-wow.com
Each login server will connect you to the same realm, but the path that each server takes is geographically different. This means that you can try each realmlist and see which one provides you with the lowest latency.
You should be able to connect to Kronos now.