Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47c42445d449a48e9105ba5259ad266f85d4455fbaa07c0f7a8200e0a21018fe' 
  AND token = 'E4Tvt1ENdZXvabmcFszoaSGbEO6tuX8doRGp3YXZwzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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