Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58bf7c063ed5c8cd86f0c6555ad9da73b3f6c8a7ff8d41464c79da4ca7f8dfc8' 
  AND token = 'WPcDrwatJfgG02jasl2MppKAmcxkopqOne2nxi5FClI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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