Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16c7d5e3c24836a8242f5f0c2960d1703818ac6bbb8b147bc214ad41d2c862d3' 
  AND token = 'Xenchaqv08rxjxylU1hDQsqOnjjnrZvMLWgSmjrY8HU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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