SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd01d82181cfdb27c53ce397dc64e257a6ffd9869c879eeb52350154bd1f7bc' 
  AND token = 'WLh9aK6jhNkh/95SfWKLqh4XBKU/pPHHkqZo+GTrJbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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