SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '950af97e3f6d519e8f173eb00935ac8cfdd4b7ebde01ff978752888896333bf7' 
  AND token = '4G1L0bNja+wqQ5XOERRzZd43ZRJGqUBnTDCud91tIBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

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