SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '767db3b7482ec4c4c57886bfef2d936c53b9282abdba94c04e80ebe797620e3d' 
  AND token = 'gnHlzWhWv+fFN15qYqA1J4LKoOFvbvwU2lXlIQKFvO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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