SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30b19ee623e92c441a55c193cb92a3de6cb3c99d3366797b917a95e4c7fefce4' 
  AND token = 'A7OsEHYXQQlsGq9fN+KiZZ7rzXFcl8STeCgiCz5GEfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

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