Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef8b021a8da86119081d8dc5b4bea08485955464edff4812b32d64585b66b2bb' 
  AND token = 'nfDS4dTrVCMUHi2ucv91jrX5DEo1xQXuJSWXwamkfmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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