SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28184d17d78ac07a1ee583bfae1082109bdbaf3b15c4cc43607f69f81f1ced64' 
  AND token = 'iuLcVKRc3tH/scpT9PENR77ivODVhQgEjQLx5Qsr82c=' 
  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