Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae79b4a61fc0c4b376ebe661cef2655bbb72bcc682a5442dba3f85ccc31066c1' 
  AND token = 'VlIKWrkd8b0znvejysmQToYLLcLTRiiYLFghycJAlug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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