Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1509d7953f545516c666bb6490c486924748cc54def53e8c73d415b2742c8d5a' 
  AND token = 'P1xntaW38j77uqw38fpi1tLo+Zd7OdKL8VD527TMoDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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