Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc89a7761f53cb5a5b82bc53fc65aa48b8d3076cc91c9622a716d68b467b7f5d' 
  AND token = '2s8NBEqhurKGgbDYSYMmGHRQ1dk3M5o2VR7tk5njO+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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