Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24f12b159e32774022261e17e1397ca7fe5b78280f4c1c96006e078ff9733b6d' 
  AND token = 'gTiSV6QdUmge4WEkiixpWChFiyTG46TTGXFklS1o8zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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