Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27d8532fb7103989be287e318ace6dff1d41852e078d100458be17e3f4a5a2b9' 
  AND token = 'TbZt3LA2QTqO4D19Ml3DH41Zcn88XmBHdmt5+et2vv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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