Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '535863b70ca9ca0eb400c81c95809da51b6e36920d883421c193f61523607685' 
  AND token = '8RjIn07i6rTDTqG5fONKAuU/2N9ewTHYOcIynP3DWIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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