Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de4b6e6ef1bcce25e614b1d7299388713c335456566dab7f4f6740bbebf8b53' 
  AND token = 'IB+/KQr7Fn/e7cj3rNbSyJM/lnqbNolborGhiMh/BYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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