Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3b53156094cc45317cafb76111aa6fb3335e0fd5f4f74b8a8c32edb4acc884d' 
  AND token = 'lu9AlyXPsfnoY/mYZwQNqZUebEBrgf37CSatLe/BM5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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