Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc4c45e2d70e4ffd22be2daa579f1f0bcda7b21e22d04bb5da9b1036bc8d9fe1' 
  AND token = 'kaSWcZSla2fe/u5R7jGgb95v5fKX4FHS0KyQLvqWOwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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