Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb98e7405ddebccf3da97b6b6d4c5f7808a4505398a3ca93bb775ed3dc343bb6' 
  AND token = 'isOSHA0SikrH3C/mkIg8KBxCYvTDoq+e75KjsiSFWA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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