KONV - alternative selection

Hi  Friends,

Please guide me for alternative for following code. Becuase KONV is a cluster table- fetching date for more time.

select knumv
           kposn
           stunr
           zaehk
           kwert
           kschl from konv
                 into table git_konv1
                 for all entries in git_vbrk
                 where knumv = git_vbrk-knumv
                   and kposn = git_vbrk-posnr
                   and kschl = c_jexp.

select knumv
           kposn
           stunr
           zaehk
           kwert
           kschl from konv
                 into table git_konv
                 for all entries in git_vbrk
                 where knumv = git_vbrk-knumv
                   and kposn = git_vbrk-posnr
                   and kschl in (c_znsr , c_zr00 , c_zr01 , c_za03 , c_za04 , c_za05 , c_za06 , c_za10 , c_zscg , c_zstc , c_zrtc ,
                                 c_zptc , c_kf00 , c_zpac , c_z0cd , c_jass , c_zocd ,c_z007 , c_zoth , c_zwhc , c_zwhs ,c_zk01 , c_zk02 ).
                                
Thanks.

Viji.