Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff1fab526d003ee1e0b306a8ae98e31c4d8dedd22585dc36b3158ded36593968' 
  AND token = 'yWaesSciMeyPbJU/CslUTfEtpJazDFpzNEz9Aa3ysOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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