[Radek]

Bsftcs is right. Only a spell will help. You will need Sorcery 10 or better for unlocking this lock by means of the Disarm Trap spell.
Don't overlook that the lock is level 12. Here is my experience with the lock:
1. A non-thief character will be unable to open the lock even if he has Lockpicking 12. The lock will be "difficult" and the character will always fail.
2. A thief-like character will be able to open the lock at Lockpicking 12 and, most likely, at slightly lower lockpicking level as well. But the lockpicking level will need to be 10 at leat, still. At Lockpicking 12, the lock will be "moderate".
3. A spell can open the lock at Sorcery 10 or higher.
4. The Trickery trait helps here. It increases your lockpicking ability by 15% so that your lockpicking level can be lower.
5. A zenmaster can open the lock at Lockpicking 14.

Please note the general lockpicking rule:
1. Give up every lock, which is "intricate" - your lockpicking skill is too low and you will fail even with lockpicks. Return later, when you have improved your lockpicking abilities.
2. Always use lockpicks, preferably good ones, if the lock is "difficult" - you have no chance without lockpicks.
3. A "moderate" lock need not be moderate at all. Save the game.