Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49b122b2a9a2ddd1d1db25694d7d6eb48a11cbc74e3f57b6637c3c7704a2827c' 
  AND token = '1ACDtevetRnRgqVpEW/gikumLNmC/Af5SxH8zS75Nuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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