Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '93281d7019b7809afa0ecc84ca8323c789f9cde99d08529086fbf61f43e035db' 
  AND token = '1gMNy+rYMBI1Ul9o5xSXXkbmCClhgjjKpZPajPm0ZmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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