Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1afeb9053c9d9109d06252fdcdbec1d177f18838d480e0c68266b7505c79a89e' 
  AND token = 'ONCtlqGrz7zX9opHyyuYHflnVd8jYFL9sMzXZkgFuP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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