Assuming you have fewer GROUPS than EMPLOYEES, and/or the GROUPS table is indexed by NAME, you could get a slightly faster query by reversing the order of the tables: 
    select e.*
    from  groups g,
          employees e
    ....

[download]
FYI - this recommendation is confirmed from https://sql-tuning.com/

                All power corrupts, but we need electricity.

In reply to Re: DBD::Sqlite queries slow - and gives wrong results by NetWallah
in thread DBD::Sqlite queries slow - and gives wrong results by astroboy

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