SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0da37959377697b6491accdb49be314b0931189ff3810597c6ac9db2c97e7bc0' 
  AND token = 'H2s87ix82ZG2lT4qiWLCx0KyBltU+rQMF+A7TljJ6eI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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