In addition to the methods above to achive what you asked, you may like to explore other methods for whatever you are doing.

If you are setting data within MyModule as constants during running then other methods may be better.

# simple setting
use MyModule qw/function/;
$MyModule::foo = 1;
$MyModule::bar = 'two';
function();

# or simple function args

use MyModule qw/function/;
function( foo => 1, bar => 'two' );

# or OO

use MyModule;
my $instance = MyModule->new( foo => 1, bar => 'two' );
$instance->function;
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If however you want the data in the anonymous hash to be passed to a function which decides on exporting methods (which is what Exporter and the import method are usually for) the you may want to rethink if exporting in that way is what you want. Then if you still want to do it step back and think again. And if you still have a good reason to do it that way that go ahead and follow the other advice above.