Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93a8be6dc8fcdf6d639bbee7cafc13e9e2cb1e58003b1300fbddffafa52ae80d' 
  AND token = 'RVKDA3UZtYRdZYWYO8eT0lGKp0LaHDHuKyQAWcDS9ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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