Gulas' digif you used the first key to unlock the door directly ahead, then the other key is inaccessible- as it's stuck behind the other locked door.
don't worry too much about it- behind that other door was just a chest with mediocre loot.
House of Secrets <
lookie here!>
You only get enough keys to access get through one route- not enough to open the doors.
if you have max lockpick, you only need to open up one route. My advice (with max lockpick),
SAVE before you pick up the open the first chest with the first two keys.
after you opne the chest, just head straight. Grab the
YELLOW KEY on the floor right by the door you opened (if the key is not there, reload the save, the door probably knocked the key into a hole- it's happened before), and keep going forward until you use the Yellow Key to unlock the door.
unlock the other doors next to the chest [they can be picked]. the Green chest has an Epic grade Accessory, the Blue chest has 8k+ to 10k+ gold, Yellow has an Epig grade equipment, Purple has an Epic grade weapon/shield.
if you don't like what you pulled, reload the save and go through again.
Forgotten CryptJump up onto the platform, and there's another one with a level to clear the poison gas and open a door to the right (or behind you).
[in the room that opens up, there's a key in the torch. Jump up onto the table to snag it.