Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efba072513de7154485f8b70e91cb825da07dab9b71a4bfc0e2d411c875eba9f' 
  AND token = 'xL7LEa45gfC2tfi4UpNo5Zb+xUu1K5Ot/xpCfLK5DyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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