Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '020865b6d10326a7169461584d9d8e955c170d6e5309caf422a59c92aee3f65d' 
  AND token = 'YkQKED+yl0yAkvOATgmVBjoei5q9RkZrI1lJTuBJ7Po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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