SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d3266264cf909043a423869ac556029b9794841a9122294faf730cde5eae5f6' 
  AND token = '/Bsn8MEwhyrK4HxGZhJC1TBL+a+zm6pKUzlsOcgQqG8=' 
  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