Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ace5eb26a4870df52f4a06ec0f8c0aa9383ed054706b1f53938ff57937f17782' 
  AND token = 'cDEkxwWud5erzoBSy2ZRnVAbRwiRRutmKCGz+PGWumU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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