Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3c4b83c1cbb7d05576a8b0b0725ebbffe0e582c2d1fd0a10c89a8d6b5041b1' 
  AND token = 'awZTuDmB/4oLU8PkkRdexVaGUsTRRzpjoJM1CJy0OpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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