Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eac2839c5359327bc0d235c5720b7cc5930f8bfb336e32ae28fca6708a9a11f' 
  AND token = 'kFxyuAXon1yTymzn2On25hzaSJ5uZOBnXPbFih+sirU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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