SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0172605fb35175aa561910d97d547e0efd2fd2df91a86a5c4cf8e49559042d4f' 
  AND token = 'heFkuVnJglrSiaGy1kmay6Pood5NxZDR1yNlzsyk/rI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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