Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e1d35b7ef001550feebc84039bcd4045df88fd2175c80a625b62be3169ac6ea' 
  AND token = 'HT7bkPHt1rqx/U6V/pJh1+Xw8ffSBbaqKyhIJbbZs40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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