SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ad420559808b89874ea4bfce9d11cf7287f619d0e2c8805cecc98d8a2e8d48' 
  AND token = 'Jr7tQewHhU2o5PJsO/YhpA28nA0x/1w/bbROCkfHnWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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