Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed882aea26d6907914a7de763c824e778d2c173fea55353819ff5379ac97f0d' 
  AND token = 'tDb1IFGp8VdaQ1r6Kvb5+IAROS8BjyNQXp22HoavRmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}