Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81bae42f09870ac1df245e29348207b14a3607b4a12b29d8fb971c7a7319b62f' 
  AND token = 'RTSn7Z+0PMU0U5hTgGgXte8koA7s46F0gwrwrpLVc/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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