SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b22576a6ce3325d32322cd4612b18e24ba8aa8225b5b17fd2d3cd75beb467e72' 
  AND token = 'rW01VxEHpP/0LROtB8tAGTofy8KqsHnFK9BbBoT7Fds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

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