Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6984d85a3a6b060b7e25e1e9e42503787abb45bfe7273067d744cedcecce69a4' 
  AND token = '2CVDB0WcD5nKICAtYlIy91SJtRWUZv5nDccguy5jWmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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