Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a20f4d11fd7103bbab70cc36005cd7d4d8d137797a7fac41e2347e02b822f484' 
  AND token = 'U2+8+duTCuwdiZ9bgZ0mq0bCkUAwZ77bRv7NwikJb6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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