SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e67ac7148528e4565dd9237668d1c7ce7964c67dc888898abf92a71c4b495c' 
  AND token = '2wuocCP1nR52L6kU5w6liIJplndWybo6cqOHaqC00DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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