Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '959694632ec021d2708f79820935a6a0bdbec713cd894f4bf50e3c4ff68e3dd2' 
  AND token = 'RKyW3tdIZMUSJzXfJlKybAE6tkXB5X1IO8zacLaEGn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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