Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '73b68e30f09a33b58ddb054ae86704045d386f57ce768c74f107374ce6c49901' 
  AND token = 'sYwcW6rN73mi+px6giXJLFuW7sx5smIEmqKROo1kWDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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