SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02034c1ec8a4dd5c3a52679065dd672d0d94c5b17cf4cb9696332b50706374e3' 
  AND token = '9Ww8nVw7JCJTrE7npc/+CEHBcDg3G8rrdP1W/IS60vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables