SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af95032227e11b4146750d761c0b0eed73015b4fc1d4bf6579a08a5a57f4c385' 
  AND token = '4vG2BQd4CoRHwYhG5Y/v2hur7InOArqBTeRisDHMwEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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