Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9040bee5fc5369faac74794003f1590aa08e3f48a4aeac9b79097a1b8108f8df' 
  AND token = '+3nH681LI4GRuVwadF7WbeF7ejvpB02U9/82pp/Z2v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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