Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4948adfdf9434e3c9f8acfc665b648e316e3620fb0d32fee529877d0a1e950cd' 
  AND token = 'd/nLfR5XSuqdnBOi3xtgPu3USZ2puzszOdm3lGbeCeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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