Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '221a47bfb93e5565ccd23097e1747fd0be4c18ef464324fd2ae4bb2cafc90498' 
  AND token = 'sxsbb4HFUrVaTXXjtJUTjRxWFXeVQhPAnbLXdeFWYbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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