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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1fe6cd4c7ce562e7237db19e1f67280cf8aec19e6861a5b49353abd45c9e0dcd' 
  AND token = 'XQl0Ce58rmGzaCZ+7qSggkz0STZaNAyM5b851vwA/3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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