Apple - Is there a similarly fast alternative to Crtl + Shift + Eject for new Macbook that lack eject keys?

I'm using a MacBook Air 2012 with Mountain Lion, and the new keyboard shortcut is:

Control+Shift+Power

I just found that I could lock my screen using the following shortcut:

Control ⌃+Shift ⇧+Power ⌽

Require password immediately after sleep or screen saver begins should be checked in the Security & Privacy in System Preferences panel if you want to ensure a slept screen is also securely locked.

If you just need to lock the screen, you can use Control ⌃ + Command ⌘ + Q available since High Sierra.