Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21240454c1e6ac2ec29947267cd8fe002543921d717f891173706e5d2985e37d' 
  AND token = 'hIsioDZURuFkV7AH+9984CO7ncS8aD66B8NqArTDX2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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