Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72ac1dc89bb7b1a11007f9cecf39bf57d97d9820b2c68cb322507fb3a7c8ce4c' 
  AND token = 'ya1oF37LelXlBCxJgV0CbSZ/VvDpLxLyWE7rKl+7Iu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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