Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5dfca1e0af28c8f6d291ea0c355774f82af531302de4aa407fdfbc273a2b00d' 
  AND token = 'lRVd2dMo85/AtbMVb3b+cVeoZQBkZm99UbHY25DSC6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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