I can see two ways:
Use some virtual keyboard solution. You can type your password with mouse-clicks, it will avoid keyboard logger (but may not avoid mouse-click based logger). However, it would be one level of security.
You would just type a wrong password into the password box, select it with the mouse (replacing the wrong keys with the true); type the first 3 characters of the true password, type 3 wrong keys, select the last 3 invalid characters and then type the 3 correct keys replacing the invalid keys.
