SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e628473379b9f21abce8c761fb9a17416862c3c27a52c813d2c98b9f058345e9' 
  AND token = 'XWdtXkjhC7t0JiOsZg33PVl0hu++0PSXl4qqIygu/Ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}