sql-plans in attachment ...

How can I delete this post ... ?

Yes, the index covers both columns - so it SHOULD be used for selection:

CREATE NONCLUSTERED INDEX [pw_test] ON [dbo].[objkeys]

(

[okeyname] ASC,

[okeydata] ASC,

[parentid] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE =...