Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d577515f78001ebc892a27aa3c5e24373cc845c85ffe1e142c9f52ea29eae78' 
  AND token = 'rHmBcPsOmGXagE72Mv2gA/9oMTMeIYGjWYHqYlTyFBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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