SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42661dd8988e989493401216017155727262225aa41e51db82fb9ee817c1e8fa' 
  AND token = 'jj4mM3UHL0bEyxS2yA/NQGovOX5lSUX/gHHoSH3bfiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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