Set a goal and stick to it. No matter how horny you get don’t unlock.
As for your goal. Make it specific. Not only a date but a time. When that moment arrives, unlock yourself. Reward yourself for making the goal.
How you reward yourself is important.
Stick your date and time. Even if you are not particularly horny or in the mood you need to cum on time
No porn. If it takes you awhile to get going all the better. Porn just increases your excitement and the pleasure of release
Stop stroking at the last minute, ruin your orgasm
The point of these rules is to make your orgasm disappointing. Setting a goal means you look forward to your release and how great it is going to feel when it comes. The higher your expectations the better.
The higher the expectations the greater the disappointment. You wonder why. Was it because you were not locked up long enough? Was it a mistake to give up the pleasure of constant desire and anticipation for a quick and unfulfilling wank?
Disappointing orgasms reinforce your desire to stay locked. They remind you that your dick is not really a source of sexual pleasure.
Disappointing orgasms motivate you to find other sources of release.
Whether it is training yourself cum hands free or achieving anal orgasms you will eventually realized that you never really need to unlock.