Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28517e0e820c8e920035b9c5cb229f44d7430a90d055e5c538578ae74d32af35' 
  AND token = 'zlB55mWOMrJnWV4ZOjmZGejpwBl3fu/yzvhcJXzYnlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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