Easy way to install SuperSU on your LG Lucky
Just follow directions
Use KingRoot 4.5.0 app - google KingRoot apk all versions. Download and install apk.
Google replace kingroot with supersu. There will be a few sites popup, Mediafire is where the original .zip file is hosted. You can even search "how to replace/remove kingroot with supersu" here on XDA for more info.
Once you have downloaded the .zip file be sure to extract it to your INTERNAL sd, the script in the zip will not work from your external sd.
Open the extracted file and copy the mrw file to the internal storage, the path should look like /storage/emulated/0/mrw.
Now go to the play store, download and install Terminal Emulator. I use the one by Jack Palevich as it is only 551kb and easy to use.
Open the terminal emulator and type "su" in order to grant super user permission to the emulator,
On the next line type "/system/bin/sh - /storage/emulated/0/mrw/root.sh" and press enter.
Now the script will run and open up SuperSU automatically. Install binary when prompted with the "normal" option. Choose yes when it asks if you want to delete other superuser apps. (this removes kingroot).
Before rebooting phone, go into the settings of SuperSU and enable pro mode, change icon if you wish, enable survival mode, enable su during boot. I think you have to restart app at this point, can't remember as I did this months ago. Then restart the SuperSU app, go back into settings to Install SuperSU into system. Reboot phone,
When phone reboots, this is when Kingroot is finally uninstalled. Your phone will still be rooted with SuperSU. At this point you may wish to update SuperSU as this is version 2.46 and the newest version is 2.71 Beta. You can get the newest version of SuperSU from the thread here on XDA.
(thanks MrWolf for the script to make the change and thank you Chainfire for SuperSU, FlashFire, CF.lumen, etc...)
From XDA
From what I have seen a factory reset may be needed to have this work.
Pro Tip: edit your first post so it has that info, so people dont have to ctrl-f the page hunting for stuff