Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '253cd9de33a9591472372602aa3e823620666ce97ebdc8f37f66b1a5b817f762' 
  AND token = 'j80wgThAxYtkR5CWvy9NW9vkDaevKZP0CQw2dbAba7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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