slow ICX_SESSIONS statement

R12.2 on Linux

A given statement on a standard eBS objects is very slow (about 1 minute per query):

select to_char(last_connect,'dd/mm/yyyy hh24:mi') last_connect

    , usr.user_name

    , resp.responsibility_key

    , function_type fntype

    , (SYSDATE-last_connect)*24*60 Mins_Idle

    , (select node_name from fnd_nodes nod where nod.node_id = icx.node_id) node_name

 from apps.icx_sessions icx

 join apps.fnd_user usr on usr.user_id=icx.user_id

 left join apps.fnd_responsibility resp on resp.responsibility_id=icx.responsibility_id

where last_connect>sysdate-nvl(FND_PROFILE.VALUE('ICX_SESSION_TIMEOUT'),30)/60/24

  and disabled_flag != 'Y' and pseudo_flag = 'N'