Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd63aed326c85e4c1635044bf47c72c0c05851451e0f092b844f9285c8397cf84' 
  AND token = 'XbLey33RsiIYggxp13a8ztt13gYuBF9ZZXUwpsAY9do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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