Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7573e4dcf96a8abe0d36bd90e8a83ddb1d60a33ee9d0ce49a7097c20b746d61' 
  AND token = 'ag6SGL1P8xtM9Ay73lDaW0EUJpFpYO4sB7hZlc20j+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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