Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '440dea6172484dfe8b605b76cde49970592faba3f195f54741908cf054faaee9' 
  AND token = 'Jj9G0Oh3pI5vFwcYEeesYgwDy71ANDEIhLWwGsPOk8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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