Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91ae540ce601f997463119648e64867730ca68c1392b8fc0c96f2c604696795e' 
  AND token = 'esXwSak61zY3ejJgQfDTplR/7Tmp3fJH7Fa5C5oU3No=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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