Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac547596a2165d8ddea72492b04a2c8dcffff29caf8321d8d114a13fd556a75a' 
  AND token = '/hOq7WnOsnoB3Ugd/x2MoPOAU4p5cItQe6ppdTd9+ak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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