Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4f4f616f95137e9467b95e2a732f92358482a3b1207135d9718a7bfe5c4523f' 
  AND token = 'E0hhYGe0vdu8UoJpI6tYWYd98j22lqE5tpy10/NXO+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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