SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f35c4c8a48a64c3b656b7a9475d41ee6ae566995aa83698f1cea7596299d6a' 
  AND token = 'XONjim7j4LLlR6f5b5Hrffoxskc+apkBNuJqY+wMJfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

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