Lockbox Keys / Hongmoon Keys... how to obtain them!

[DiBBz]

so im only level 15 and currently finishing questing in the forest area of viridian... and while ive used pretty much all my keys on lockboxes, i honestly have no clue in how you obtain regular keys / hongmoon keys etc etc!

 

same goes withsuperior viridian keys which you get from those daily viridian chests. thats practically all i know tho.

 

can anyone shed light on how il come across or be able to farm / obtain keys for future lockboxes ?