This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 弆 is uncertain. It visually combines 去 on top and 廾 on the bottom, but the original semantic and phonetic roles of these components are unclear.
With no clear meaning, picture 去 (gone) over 廾 (two hands), as if something has been put away by two hands and is now gone.
For キョ, imagine a key (キー) that locks away something gone (去) with two hands (廾): key -> キョ.