SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07adb61fe6edc168b5924181b6114dedcc9146603bb69aa42d6e6d673882f7e4' 
  AND token = 'NLKuL/CFxKD3rO7bugLBgYm+jkKwgTR3lPyFx6zKI+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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