Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83ad2a6aa95069e9831a6598ba1560bef2045e1ce29b89bc4f5b1c4fc425f5c7' 
  AND token = 'nVE14jiXQaeQtw6icxL4L/CHUe2aYNP5UE0HQBUjZdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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