SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61685d4a8b403ba0330e3ea211c9345a21dcd35e5a7823455d3d9f25eb18077e' 
  AND token = 'jGOGVIdflVJgncqhEuY/DTw1hamj/kgtZUkmzWWHsNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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