Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40025f4af118b0c5cced9ed7b408c65ed9f60ad53f7619be27a6bd32c94b90f2' 
  AND token = '8KXdjpNTFS79HD+Yb9OAEXvczywQQmZIigStXmLza4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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