diff --git a/bin/ngcp-fraud-auto-lock b/bin/ngcp-fraud-auto-lock
index 5325ba7..e3012ec 100755
--- a/bin/ngcp-fraud-auto-lock
+++ b/bin/ngcp-fraud-auto-lock
@@ -45,6 +45,7 @@ FROM (
     ON (bp.id =
       (SELECT m.billing_profile_id
         FROM billing.billing_mappings m
+         USE INDEX (contractid_idx)
         JOIN products pr ON pr.id = m.product_id
         WHERE ((m.start_date IS NULL) OR (m.start_date <= NOW()))
           AND ((m.end_date IS NULL) OR (m.end_date >= NOW()))
diff --git a/bin/ngcp-fraud-daily-lock b/bin/ngcp-fraud-daily-lock
index 3ed54d3..60b27ec 100755
--- a/bin/ngcp-fraud-daily-lock
+++ b/bin/ngcp-fraud-daily-lock
@@ -41,6 +41,7 @@ FROM (
     ON (bp.id =
       (SELECT m.billing_profile_id
         FROM billing.billing_mappings m
+         USE INDEX (contractid_idx)
         WHERE ((m.start_date IS NULL) OR (m.start_date <= NOW()))
           AND ((m.end_date IS NULL) OR (m.end_date >= NOW()))
           AND (m.contract_id = contracts.id)