I locked my keys in the trunk of my 2011 Kia optima. I am inside the passenger compartment how can I open the trunk to get my keys?

Mitch, No fuse for the headlamps. Controlled by the IPM,(Intelligent integrated Platform Module) fuse box under dash, has a built in smart circuit breaker that trips. It should reset if the key is cycled, but if the short is still there it will open again.
Check the attached links, last link shows IPM.
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The handle could have come apart inside the door.

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if they do fold down reach in with a coathanger to reach the releases.. if not.. they bolt in and cant be removed from the trunk side as they were installed from the inside.. but a slim jim can open the car.. call law enforcement and they will come by and open it for you..especially if there is an issue like your child locked inside(or your dog)..

Most vehicles that have a power release, also have a manual release. Check inside the vehicle, around the location of the outside filler door. You might have a removable panel, that will reveal the fuel door release cable.

the only way to unlock the trunk without damage to the lock is to fold the back seat down or remove it if folding is not an option. crawl inside the trunk and pull the safety release handle. it is usually a glow in the dark t-handle hanging by a small cord. it is there in case someone is locked in the trunk and glow in the dark for when you dont have light to look for it. this will release the trunk latch so you can open the trunk and make repairs if necessary.

By switching the lever you locked the inside trunk release, you will need to put lever back. as far as the trunk you may need to remove the rear seat, pop lower part out and then remove the bolts to the top half of the seat then try to reach the lever so it will open from the inside. i've found that many of these cars with the pop lever inside have sticking trunk locks from not being used, what you do first is spary lock good,with wd40 or pb blaster then slide key in and out and try to turn this may take a whhile but it works then tumbler will free up, you just have to keep spraying inside lock and working the key.

Tahe a metal hanger, straighten everything except the hook, stick the hook on the lock mechanism and pull hard and fast. If you go too slow the hanger will bend**to be more specific the locking mechanism is inside the child seat anchor, located behind the headrests in the back dash area on either side of the vehicle, pull the grey casing out of the backdash and if you look inside there's the latch, make a nice bend at the tip of the coat hanger and pull the metal latch pull,not the cable(i almost snapped mine :0 )ive done this with 100% accuracy on an 06' and 12' models but any model with upper trunk rear folding seat latches should be fine.

Your door latching mechanism is loose or defective. or maybe Christines' deendent. Spookuy huh?

Look at the latch and see if it's already in it's locked position. This will cause the trunk to not latch. Id so you must turn the key while puling open the c shaped clip.