Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35690352f96740ce2f1cef702a5384957d738beb850ca407290822003917956d' 
  AND token = 'ib7FJeIsRMNWyKC27qlpKqttxOxiCAekBib0iNsZSmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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