Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e2f866ad6074c088e634f84cb3a75a971a13bf0e717bb81e22fcd1c3387bdfc' 
  AND token = 'wfia6l87Ie6j+XWDsFIz9sDN3gD3MQ4G/5M96tSFyfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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