Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74099e47ab358add286b7ad713e399f799f7b5ff3347601a5d9b5e02e4d76e92' 
  AND token = '9jFCq9UnmJyTWndoWiglU99ZzhAB2ydgzqeH9s4b1wA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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