CREATE TABLE table_name_72 (is_3_m1945 VARCHAR, kv_1s_m1942 VARCHAR)

What's the IS-3 when the KV-1S is 45?
SELECT is_3_m1945 FROM table_name_72 WHERE kv_1s_m1942 = "45"
SELECT "is_3_m1945" FROM "table_name_72" WHERE "45" = "kv_1s_m1942"