Certain 'area unlock keys' are no longer actual items.

[NiteHawk]

The dreadlands key, shard necklace, and ring of arcane protection are no longer in use.

To convert to the new system, simply unequip these items from your character and USE the item. It will allow you to pass the area like normal, but without requiring an additional equip slot. You can view your 'passive' keys with the command /keys

This was done to keep the equipment space a little less cluttered. Specially with new things coming out! The quest has also been adjusted to do this automatically.

Additional keys that unlock areas may be converted (Let us know if you know of any.) Thanks!