mysql> select
    -> ifnull(round(sum(log.seconds)/60),0) sum_minutes
    -> from zenoreport.v2v25log log
    -> left join `zenoradio-v25`.data_listener_ani dla on log.ani = dla.ani_e164
    -> left join `zenoradio-v25`.data_listener_ani_carrier dlac on dla.carrier_id = dlac.id
    -> left join `zenoradio-v25`.data_entryway de on log.did = de.did_e164
    -> where date(log.date_start) >= '2015-10-01'
    -> and date(log.date_start) <= '2015-10-31'
    -> and de.entryway_provider = 75;
+-------------+
| sum_minutes |
+-------------+
|    35947620 |
+-------------+
1 row in set (29.07 sec)

mysql> select
    -> ifnull(round(sum(log.seconds)/60),0) sum_minutes
    -> from zenoreport.v2v25log log
    -> left join `zenoradio-v25`.data_entryway de on log.did = de.did_e164
    -> where date(log.date_start) >= '2015-10-01'
    -> and date(log.date_start) <= '2015-10-31'
    -> and de.entryway_provider = 75;
+-------------+
| sum_minutes |
+-------------+
|    35847922 |
+-------------+
1 row in set (17.22 sec)