[exim] Conditions: Pseudo to Exim translation help

I would like to say:
if acl_mvirusscan=1 AND acl_m_spamscan=2 then acl_m_userouter = sysquar

but I'm not sure how I do that with the constructs in Exim.

Something like (but does not seem to work):

set acl_m_userouter = ${if eq {$acl_mvirusscan}{1} && eq
{$acl_mvirusscan}{1}{sysquar}}

I'm not entirely sure how I can set a condition based on and 'and' or
even if I can. Any help appreciated.

Ron