Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1beac1c8934d91b63ab6b627b458ba0c7d125a92173183b3d9f648a07414873c' 
  AND token = '3ZjM5lgit7k/JfiuQ2n2JvhJmNBOwtLkpD06iPaiUEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}